AndNav1 was based on Google maps, but Google doesn't provide free access to underlying data. AndNav2 uses OpenStreetMap to provide unique features, such as Text-2-Speech, an accessibility-study (aka 'Where can I get in 30 minutes') or avoiding customizable areas (e.g. traffic-jams or a broken bridge), TpegML Traffic-Feeds and more. AndNav2 will also contribute back GPS traces to the OSM project, so when you have driven an unknown route, expect it to be up online within a week or even sooner.